CN105584420A - Multi-curvature rear view mirror lens - Google Patents
Multi-curvature rear view mirror lens Download PDFInfo
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- CN105584420A CN105584420A CN201410558962.9A CN201410558962A CN105584420A CN 105584420 A CN105584420 A CN 105584420A CN 201410558962 A CN201410558962 A CN 201410558962A CN 105584420 A CN105584420 A CN 105584420A
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Abstract
The invention discloses a multi-curvature rear view mirror lens, pertaining to the technical field of auto parts. A mirror surface of the lens is a multi-curvature free curved surface combined by multiple small mirror surfaces. Curvature radii are different among the multiple small mirror surfaces and different directions of each small mirror surface. The curvature radius of an overall mirror surface firstly decreases and then increases from the top to the bottom. So does the change rate of the curvature radius. The curvature radius of the overall mirror surface firstly decreases and then increases from the left to the right. So does the change rate of the curvature radius. The multi-curvature rear view mirror lens has following beneficial effects: the curvature radius of the overall mirror surface of the multi-curvature rear view mirror lens keeps changing so that each small mirror covers a small area in the approximation to a point; a smooth surface is achieved after splicing of the multiple small mirror surfaces; uniform imaging is obtained by mirror surfaces without hopping so that no interference is caused to riding of a driver and a field range is broad and image distortion is less; and the multi-curvature rear view mirror lens is simple in structure and low in cost.
Description
Technical field
The present invention relates to technical field of automobile parts, be specifically related to a kind of multi-curvature rear view mirror lens.
Background technology
The automobile rearview mirror of general vehicle is the convex mirror of level crossing or single curvature, the problem of ubiquity visual field short of width,Or there is blind area, or have image distortion, thereby driver can accurately the position of disturbance in judgement thing and the distance of vehicle body and barrier,To have a strong impact on traffic safety. According to statistics, because rear view mirror blind zone is caused traffic accident and is accounted for 30% in China. Therefore, howDesign a large visual field, little blind area, and the little rearview mirror of image fault is instantly important research topic.
Rearview mirror, as the vitals on automobile, has been released many functions, the different product of external form in recent years on the market. AfterThe imaging effect of visor is relevant with the radius of curvature of minute surface, and radius of curvature is larger, and image fault is less, but field range is also less;Otherwise radius of curvature is larger, field range is also larger, but image fault also can be serious. According to the difference of mirror shape, existingRearview mirror roughly can be divided into following a few class: the first kind is level crossing, and its radius of curvature is infinitely great, and image is undistorted, but looksWild scope is very little, easily produces larger blind area, brings a lot of inconvenience to driving; Equations of The Second Kind is single mirror, and its mirror shape is single songThe convex mirror of rate, it has dwindled level crossing curvature mirror radius, its essence is taking image fault as cost is with the scope of broadening one's vision; TheThree classes are hyperbolic mirrors. Now double curvature rearview mirror mostly on the market is and on level crossing, installs that convex surface roundlet mirror realizes additional, although itSolve to a certain extent the contradiction of image distortion and visual field size, but owing to needing driver to observe the district of different curvatures on minute surfaceTerritory, makes troubles to driving and judgement, and the design of two minute surfaces has simultaneously increased cost greatly, also not attractive in appearance in appearance. The 4thClass is many Qu Jing, its essence is that minute surface inner side 3/4 scope is plane, and outside 1/4 scope is the curved surface of curvature gradual change, its effectRoughly the same with hyperbolic mirror, just two mirrors are put in a face, still there is the inconvenient problem of observing, also strengthen and driven simultaneouslyThe person of sailing judges the difficulty of vehicle body and obstacle distance. For example, in the patent that application number is CN201220074757.1, disclose a kind of manyCurvature vehicle rearview eyeglass, its eyeglass body comprises first curvature portion and torsion portion, first curvature portion radius of curvature is greater than secondCurvature portion, although this can above solve the contradiction of distortion and blind area in surface, near the minute surface stitching position of two different curvature, songRate change in radius is violent, can cause image distortion, and driver is difficult to by the rearview mirror distance of disturbance in judgement thing exactly.
The defect of existing rearview mirror is more obvious on truck. Rearview mirror of truck is made up of 6 convex mirrors on the market now, respectivelyFor two, left side, four, right side. Taking four of right side as example, be respectively front lower visor, main rearview mirror from front to back, mend blind mirror withAnd the wide-angle lens of main rearview mirror below. As the term suggests what main rearview mirror was mainly observed is more than wheel, the region after the 4m of parking stall,Its radius of curvature is R1800mm, and the larger distortion of field range is less; Front lower visor is mainly to observe position, car front lower place, mendsBlind mirror is mainly to observe position, vehicle body lower right side, and wide-angle lens is mainly used in making up the defect of main rearview mirror, for observing wheel position.The radius of curvature of these three minute surfaces is about R200-300mm, and radius of curvature is less, and distortion is very serious. So to whole rearview mirrorGroup, although learn from other's strong points to offset one's weaknesses by multiple minute surfaces, makes rearview mirror of truck almost realize zero blind area, becomes image distortion very serious,When driver observes, can produce serious spinning sensation, increase driving dangerous.
From the above, for the improvement of car rear-view, many methods are proposed, but for the improvement of truck rearview mirrorConsiderably less. In actual conditions, truck driver mostly is at night or poor suburb, the mountain area of road conditions and travels, more XXL rowThe danger of car, so it is extremely important to propose a kind of improvement to rearview mirror of truck.
Summary of the invention
In view of above problem, the object of the present invention is to provide a kind of multi-curvature rear view mirror lens, can broaden one's vision, reduce blind area,Can reduce again the image fault problem that reduces to bring because of radius of curvature, can be widely used on various cars and truck.
In order to realize above object, the technical solution used in the present invention is:
A kind of multi-curvature rear view mirror lens, the minute surface of eyeglass is the multi-curvature free form surface being combined by multiple little minute surfaces, Duo Ge littleRadius of curvature difference between minute surface, each little minute surface radius of curvature is in different directions also different; The radius of curvature of whole minute surfaceFirst reduce from top to bottom rear increase, the rate of change of its radius of curvature is also first to reduce rear increase; The radius of curvature of whole minute surface from a left side toRightly first reduce rear increase, the rate of change of its radius of curvature is also first to reduce rear increase.
The minimum place of the radius of curvature of described minute surface and the minimum place of radius of curvature rate of change are any point on minute surface horizontal center line,And radius of curvature minimum not necessarily overlaps in the minimum place of radius of curvature rate of change.
Described minute surface is about horizontal center line symmetry, not necessarily symmetrical about vertical center line, and minute surface is smooth surface.
Further, in described minute surface, about two little minute surface face type symmetries of horizontal center line symmetry, and two little minute surfaces are closingRadius of curvature in the direction of horizontal center line symmetry is identical, and about two little minute surface face types of vertical center line symmetry not necessarilySymmetry, and two little minute surfaces radius of curvature in the direction about vertical center line symmetry is also not necessarily identical.
When described eyeglass is arranged on the rearview mirror of car, minute surface horizontal center line not necessarily overlaps with the horizontal center line of rearview mirror. OnState the minute surface horizontal center line that horizontal center line refers to preliminary working and do not carry out the prototype multi-curvature rear view mirror lens of any cutting. WillWhen this eyeglass is arranged on the rearview mirror of car, prototype eyeglass need be carried out to cutting, now the horizontal center line of rear-vision mirror face and prototypeThe minute surface horizontal center line of eyeglass not necessarily overlaps, and on can the rear-vision mirror face after cutting, finds the level of above-mentioned prototype minute surfaceCenter line, makes minute surface about this center line face type and radius of curvature symmetry.
On described minute surface, the scope of each point radius of curvature is R200mm～R2000mm.
On the vertical direction of described minute surface, be equipped with graticule.
Further, at least one mirror in the blind mirror of front lower visor, wide-angle lens and benefit of described truck adopts described rear view mirror lens.
For common spherical mirror, imaging effect is relevant with the radius of curvature of minute surface, and generally, radius of curvature is larger, and image losesVery less, but field range is also less, and the distortion mentioned here lays particular emphasis on image and whether produces distortion or distortion. And institute of the present inventionThe multi-curvature rear-vision mirror face proposing is to continue by radius of curvature the multi-curvature free form surface changing, when human eye is from this rearview mirror dead aheadObserve when minute surface, the image of minute surface center does not almost have distortion, from minute surface center to left side and right side edge position observeWhen minute surface, distortion is serious gradually. In addition, on the multi-curvature rearview mirror in the present invention, be also provided with graticule, can be used for helping driver to enterRow distance judgement. Because the barrier of different distance different size is imaged on varying in size of mirror surface, can be according to different carsA large amount of test results of type and driver are put on two vertical graticules on rearview mirror, when back car or barrier are positioned at twoIn graticule, or its lateral dimension is while being less than the spacing of two graticules, illustrates that back car is in safe range, can surpassCar and the operation of turning round; In the time that the obstacles borders of observing exceeds two graticules or its size and exceeds two distance between bench marks, this is describedBarrier is positioned at hazardous area, very near apart from vehicle body, the operation of cannot overtaking other vehicles and turn round. The demarcation of this graticule, has solvedLarge view rear viewing mirror is difficult to carry out the problem of Distance Judgment.
Multi-curvature rear view mirror lens in the present invention, from first and last, whole minute surface presents a kind of radius of curvature and continues the state changing,Each little minute surface area is very little, can be approximately a point. The rear surface that is stitched together is smooth, and mirror image is evenly without obviously distortion, noCan cause interference to driver's driving observation, can accomplish that field range is large, while image fault is less and observe comfortable. Due toMulti-curvature rearview mirror of the present invention only has a minute surface, and simple in structure, difficulty of processing is lower, cost. In addition, on minute surfaceAdd graticule, foundation is provided to driver's judging distance, greatly improved traffic safety, strengthened the practicality of rearview mirror.
Meanwhile, the multi-curvature rear view mirror lens in the present invention also can be used on rearview mirror of truck, for replace existing front lower visor,Mend blind mirror, wide-angle lens, can effectively make up the serious problem of original rearview mirror distortion, realize that distortion is little, the visual field is wide, non-blind area,Observe comfortable, low cost and other advantages.
Brief description of the drawings
Fig. 1 is multi-curvature rear view mirror lens schematic perspective view of the present invention;
Fig. 2 is the top view of multi-curvature rear view mirror lens of the present invention;
Fig. 3 is the front view of multi-curvature rear view mirror lens of the present invention;
Fig. 4 is the details exploded view of multi-curvature rear view mirror lens of the present invention;
Fig. 5 is the schematic diagram that graticule is set on multi-curvature rear view mirror lens of the present invention;
Fig. 6 is the schematic diagram of the scope of multi-curvature rear view mirror lens field-of-view angle expansion of the present invention;
Fig. 7 is the schematic diagram of the scope of multi-curvature rear view mirror lens of the present invention visual field enlarged areas
Fig. 8 is that multi-curvature rear view mirror lens of the present invention is programmed and calculated field range schematic diagram under MATLAB environment;
Fig. 9 is multi-curvature rear view mirror lens distortion level measuring method schematic diagram of the present invention;
Figure 10 is the application schematic diagram of multi-curvature rear view mirror lens of the present invention on truck right side.
Detailed description of the invention
Multi-curvature backsight eyeglass of the present invention can be used for common car and truck, effectively improve existing rearview mirror market little orThe problem that distortion is serious accomplishes to control cost simultaneously, reduces difficulty of processing.
Embodiment 1
The present embodiment has been described a kind of multi-curvature rearview mirror for common car, and is left-hand mirror.
As shown in Figure 1, multi-curvature rearview mirror of the present invention is one to have the mirror body 1 of curved surfaces, and this mirror body is left-hand mirror, afterThe visual field of visor is about 45 °.
As shown in Figure 2, minute surface described in the present embodiment, sees that from top view this minute surface is a rectangle, and it is of a size of 168mm*100mm.
As shown in Figure 3, multi-curvature rearview mirror of the present invention is one to have the mirror body 1 of curved surfaces, minute surface is kept flat on the table,Upward, from dead ahead angle, convex surface peak is 11.86mm to the rise of desktop to convex surface.
As shown in Figure 4, the minute surface of rearview mirror is the multi-curvature cambered surface being combined by multiple little minute surfaces, the curvature of multiple little minute surfaces halfFootpath difference, each little minute surface radius of curvature is in different directions also different; After the radius of curvature of whole minute surface first reduces from top to bottomIncrease, the rate of change of corresponding radius of curvature is also first to reduce rear increase; This curvature mirror radius first reduces rear increasing from inner side to outsideThe rate of change of radius of curvature is also first to reduce rear increase greatly, accordingly.
Minute surface described in the present embodiment, the scope of horizontal direction radius of curvature is R400～R800mm, the model of vertical direction radius of curvatureEnclosing is R200～R500mm.
In whole minute surface, about any two little minute surfaces of horizontal center line symmetry, at the both direction about horizontal center line symmetryOn radius of curvature identical, not necessarily identical about two little curvature mirror radiuses of vertical center line symmetry. In the present embodiment,The radius of curvature of minute surface central point in the horizontal direction with vertical direction be respectively 498.913250914137mm and300.578312673584mm. The radius of curvature of four marginal point A, B, C, D is respectively:
Horizontal direction: A point: 655.2851, B point: 655.2851, C point: 645.4441, D point: 645.4441.
Vertical direction: A point: 361.2046, B point: 361.2046, C point: 407.8382, D point: 407.8382.
Wherein A point and B point, C point and D point be about horizontal center line symmetry, B point and C point, A point with D point about verticalCenter line symmetry. This shows, A point is identical with B point radius of curvature, and C point is identical with D point radius of curvature, but B pointNot identical with radius of curvature between C point, A point and D point.
As shown in Figure 5, multi-curvature rearview mirror is marked with the graticule 2 that can help judging distance. From top view, two graticules2 is the straight line from minute surface top edge to lower limb, and two graticules 2 are positioned at the centre position of minute surface, and spacing is 2～5mm. On minute surface,Article two, the s1Wei safety zone, region of graticule and minute surface surrounded by edges, the region s2 in two graticule 2 outsides and s3 are deathtrap.From mirror, observe, when back car or barrier are positioned at region s1, or its lateral dimension is less than the spacing of two graticules 2Time, illustrate that back car is in safe range, the operation of can overtaking other vehicles and turn round; When the obstacles borders of observing is in regionWithin the scope of s2 and s3 or when its size exceeds two distance between bench marks, illustrate that this barrier is positioned at hazardous area, apart from vehicle body veryClosely, the operation of cannot overtaking other vehicles and turn round.
The imaging advantage of multi-curvature rear view mirror lens of the present invention is specific as follows: as shown in Figure 6, in the present embodiment, utilizeWhen common rearview mirror is observed, can be observed field range only has 15 °, and utilizes multi-curvature rearview mirror of the present invention, visual field modelEnclose angle and can expand 45 ° to. As shown in Figure 7, the area that whole solid box is surrounded is the multi-curvature that utilizes the present invention to propose of simulationField range when rearview mirror is observed, wherein the area of dotted line is for utilizing common rearview mirror in the time that same position is observedField range. As shown in Figure 8, the multi-curvature rearview mirror of the present invention institute calculating for programming under MATLAB environmentThe angular range that can observe. Can intuitively find out thus and utilize the multi-curvature rearview mirror of the present invention model of can effectively broadening one's visionEnclose.
In the present embodiment, can carry out simulation test to the distortion level of minute surface. As shown in Figure 9, measure the distortion of rear-view mirror surface imagingThe method of degree is as follows: first, by square net or vertical line or horizontal linear imaging in rearview mirror, now in rearview mirror, seeStraight line have flexural deformation, main manifestations is epirelief or recessed. Flexural deformation degree is higher, and to be illustrated as image distortion more serious, anti-The less imaging of straight-line bending degree distortion level less. For a certain bending above-mentioned straight line, calculate its epirelief peak orThe recessed minimum point of person and the former minimum range a that is not out of shape straight line, then measure the distance b of above-mentioned same point to minute surface geometric center point,The ratio a/b of above-mentioned minimum range a and the above-mentioned distance b to central point is this distortion straight line distortion rate on rearview mirror.Finally calculate the distortion rate of each little grid on minute surface or straight line and average, this mean value is the imaging of whole minute surface and losesSincere approximation.
In the time that driver observes the position, rearview mirror center of the present embodiment, imaging is distortion hardly, and field range is very large. ForDriver, while utilizing rearview mirror to observe around vehicle condition, mainly observes the center of minute surface, so use the present embodiment to proposeMulti-curvature rearview mirror, not only distortion low coverage is wide, can also avoid driver to have a spinning sensation because of what observe that minute surface brings. In addition,Add graticule to minute surface, help driver to carry out Distance Judgment, increase traffic safety.
Embodiment 2
The present embodiment has been described a kind of multi-curvature rearview mirror group for truck.
Rearview mirror of truck is made up of 6 convex mirrors, is respectively two, left side, four, right side. Taking four of right side as example, arrive in the pastRear be respectively front lower visor, main rearview mirror, mend the wide-angle lens of blind mirror and main rearview mirror below. Truck left side only have main rearview mirror andMend blind mirror. Wherein front lower visor, mend blind mirror and wide-angle lens radius of curvature less, distortion is serious. As shown in figure 10, this enforcementExample is exactly to utilize the multi-curvature rearview mirror that the present invention proposes to replace at least one in these three kinds of mirrors, wherein M1-M3Be followed successively by front lower visor, mend blind mirror and wide-angle lens.
Utilize the multi-curvature rear view mirror lens that the present invention proposes to substitute after rearview mirror of truck eyeglass, not only solved well existing truckRearview mirror becomes the serious problem of image distortion, has also effectively alleviated the spinning sensation seriously bringing because of existing rearview mirror distortion while observation.Meanwhile, can also add graticule to minute surface if desired, help driver to carry out Distance Judgment, increase traffic safety.
Claims (9)
1. a multi-curvature rear view mirror lens, is characterized in that, the minute surface of eyeglass is the multi-curvature being combined by multiple little minute surfacesFree form surface, the radius of curvature difference between multiple little minute surfaces, each little minute surface radius of curvature is in different directions also different; WholeThe radius of curvature of individual minute surface first reduces rear increase from top to bottom, and the rate of change of its radius of curvature is also first to reduce rear increase; Whole minute surfaceRadius of curvature from left to right first reduce rear increase, the rate of change of its radius of curvature is also first to reduce rear increase.
2. a kind of multi-curvature rear view mirror lens according to claim 1, is characterized in that, the radius of curvature of described minute surfaceThe minimum place of minimum place and radius of curvature rate of change is any point on minute surface horizontal center line.
3. a kind of multi-curvature rear view mirror lens according to claim 2, is characterized in that, described eyeglass be arranged on car afterOn visor time, minute surface horizontal center line not necessarily overlaps with the horizontal center line of rearview mirror.
4. a kind of multi-curvature rear view mirror lens according to claim 1 and 2, is characterized in that, described minute surface is about levelCenter line symmetry, not necessarily symmetrical about vertical center line, and minute surface is smooth surface.
5. a kind of multi-curvature rear view mirror lens according to claim 4, is characterized in that, in described minute surface, about levelTwo little minute surface face type symmetries of center line symmetry, and two little minute surfaces radius of curvature in the direction about horizontal center line symmetryIdentical, and not necessarily symmetrical about two little minute surface face types of vertical center line symmetry, and two little minute surfaces are about vertical center lineRadius of curvature in symmetrical direction is also not necessarily identical.
6. a kind of multi-curvature rear view mirror lens according to claim 5, is characterized in that, described eyeglass be arranged on car afterOn visor time, minute surface horizontal center line not necessarily overlaps with the horizontal center line of rearview mirror.
7. a kind of multi-curvature rear view mirror lens according to claim 1 and 2, is characterized in that, each point song on described minute surfaceThe scope of rate radius is R200mm～R2000mm.
8. a kind of multi-curvature rear view mirror lens according to claim 1 and 2, is characterized in that, the vertical side of described minute surfaceUpwards be equipped with graticule.
9. according to a kind of multi-curvature rear view mirror lens described in claim 3 or 6, it is characterized in that described rear view mirror lens peaceWhile being contained on the rearview mirror of truck, at least one mirror in the blind mirror of front lower visor, wide-angle lens and benefit of described truck adopt described afterVisor eyeglass.
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| CN201410558962.9A CN105584420B (en) | 2014-10-20 | 2014-10-20 | A kind of multi-curvature rear view mirror lens |
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| CN201410558962.9A CN105584420B (en) | 2014-10-20 | 2014-10-20 | A kind of multi-curvature rear view mirror lens |
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| CN105584420B CN105584420B (en) | 2018-08-17 |
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| CN109752843A (en) * | 2019-03-06 | 2019-05-14 | 西安自由曲面光电科技有限公司 | A kind of implementation method of the low automobile rearview mirror that distorts of the big visual field of free form surface |
| CN110641371A (en) * | 2019-10-30 | 2020-01-03 | 无锡福照玻璃镜业有限公司 | Multi-curvature automobile rearview mirror lens |
| CN114590201A (en) * | 2022-03-11 | 2022-06-07 | 江铃汽车股份有限公司 | Method for drawing minimum mirror surface of exterior rearview mirror based on human-machine engineering |
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| CN114590201A (en) * | 2022-03-11 | 2022-06-07 | 江铃汽车股份有限公司 | Method for drawing minimum mirror surface of exterior rearview mirror based on human-machine engineering |
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